Aortic Valve StenosisAortic ValveHeart Valve Prosthesis ImplantationHeart Valve ProsthesisBloodless Medical and Surgical ProceduresAortic Valve InsufficiencyCardiac CatheterizationPulmonary Valve StenosisSeverity of Illness IndexHeart Valve DiseasesCalcinosisMitral ValveMitral Valve StenosisTricuspid Valve StenosisBioprosthesisCatheterizationEchocardiographyPulmonary ValveEchocardiography, DopplerTreatment OutcomeProsthesis DesignCarotid StenosisHypoplastic Left Heart SyndromeBalloon ValvuloplastyEchocardiography, TransesophagealAngiodysplasiaHemodynamicsTricuspid ValveEchocardiography, Doppler, ColorCoronary StenosisBlood Flow VelocityFollow-Up StudiesVentricular Function, LeftVentricular Outflow ObstructionSpinal StenosisProspective StudiesMitral Valve InsufficiencyHeart VentriclesTracheal StenosisTime FactorsAortaRetrospective StudiesAortic Valve ProlapseVentricular Dysfunction, LeftStroke VolumeRisk FactorsHeart Defects, CongenitalObserver VariationPulmonary Subvalvular StenosisPredictive Value of TestsRisk AssessmentEndocarditis, BacterialMitral Valve ProlapseConstriction, PathologicPyloric StenosisDisease ProgressionRheumatic Heart DiseasePhonocardiographyDiscrete Subaortic StenosisDiastoleHypertrophy, Left VentricularInfant, Newborn